Reproductive Behavior: The seed heads break up and are blown to new locations by the wind("Bulrush.")

Primary Consumer-ZooplanktonSecondary Consumer-Yellow PerchDecomposer - Sandy LaccariaEnergy Pyramid http://iceominiums.comHabitat- Found in lakes, ponds, and slow-moving rivers throughout Minnesota.Population- Minnesota is full of perch, but the numbers are decreasing.Reproductive Behavior- They spawn in early-may in the Southern lakes and mid-May in the northern lakes. The Eggs hatch after 2-3 weeks. Nutrition- Perch are secondary consumers and heterotrophs, they eat minnows and the young of other fish, they also eat insects like mayflies.Human Usefulness- Yellow Perch provide as a source of food.Symbiotic Relationship- An example of parasitism is when an Anchor Worm burrows into a Yellow Perch, feeds, and leaves the fish skin red and inflamed (Minnesota Sea Grant).Sensitivity to Environment- There are many Yellow Perch in Minnesota but the numbers are dropping because of overfishing (Minnesota DNR).http://en.wikipedia.orghttp://hdw.eweb4.com/out/596175.htmlHabitat- Found in freshwater, ponds, streams and they drift on top of the water.Population- There are numerous Zooplankton found in a healthy lake ecosystem. Reproductive Behavior- They reproduce rapidly. Nutrition- They are primary consumers, and are heterotrophs. They eat Phytoplankton and algae.Sensitivity to Environment- When the Ph levels change it affects the Zooplankton's prey which affects their survival rate (MarineBio).Human Usefulness- Zooplankton form the lower part of the food chain, insuring the organisms higher in the food chain are healthy which also includes humans (Wilkinson).Symbiotic Relationship- An example of mutualism is Zooplankton eating all the algae which keeps the rest of the organisms healthy and the algae from getting out of control.http://www.outdooralabama.com/fishing/freshwater/where/ponds/p/ap/guide/submersed/nitellaspp.cfmhttp://geology.com/lakes-rivers-water/minnesota.shtmlStonewortBioticfishturtlesinsectsfrogsplantsAbiotic("Lakes.")WaterrockssandsoilFood Web http://techalive.mtu.edu/meec/module08/FoodWeb.htmhttp://hungrynaturalist.blogspot.com/2011/10/vol-1-no-33-autumn-mushrooms.htmlNutritional Requirements: Decomposes the remains of other energy levels to gain energy

Sensitivity to Environmental Insults: Pollution to sandy soil and deposits of nitrogen